Seriously? McEnroe to make his own line calls

Legendary firebrand 'nervous and excited' ahead of match

Tennis legend John McEnroe faces James Blake on Wednesday in a match in which they will call their own lines - declaring whether the ball is in or out - a wrinkle McEnroe knows will draw more than casual interest from fans and former linesmen.

During a career in which he won seven Grand Slam singles titles, McEnroe was known as a volatile player who periodically berated linesmen over what he saw as blown calls. "You cannot be serious!" he once yelled in a famous tirade over a line call.